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**A note on VESA support of 486 chipsets.
Many chipsets state  that they support VESA local  bus.  In some cases
these actually  implement VLB somewhat  like PCI, where it  is entirly
decoupled from the CPU bus. Chipsets  that do not state they work with
VLB,  may  be found  on  motherboards  that  contain VLB  slots.   VLB
is  *basically*  The 486  CPU  pinout in  a  slot  form. Unless  these
m/boards contain  some additional  chips, there VLB  implementation is
directly coupled to the CPU.

**Datasheets:...
*_IBM...
*ACC Micro...
*ALD...
*ALi...
**M1541/42/33/43 Aladdin V & V+    50-100MHz                         ?
***Info:
****M1541/1542 AGP/CPU-to-PCI bridge/Memory/Cache and Buffer Ctrl.:...
****M1543/C    PCI-to-ISA Bus Bridge with Super I/O & Fast IR:...
***Configurations:
M1541/M1542 System Controller
M1533/M1543 PCI-to-ISA Bus Bridge

M1541 + M1533
M1541 + M1543
M1542 + M1533
M1542 + M1543

See the M1531 section for details on the M1533.

The datasheet  is very confusing  as it does  not state how  the terms
M1531, M1532, Aladdin V and Aladdin V+ relate to each other. According
to:
http://pclinks.xtreemhost.com/chipsets_pentium.htm

The Aladdin V and Aladdin V+ names are both associated with the M1541.
The M1541 has 5 revisions, A  thru E.  The M1542 part number is assoc-
iated with revision  F onwards. The main difference  with the M1542 is
that it now can cache 512MB  of RAM, instead of only 128MB.  The diff-
erence between the Aladdin V and  Aladdin V+ is that the V+ officially
supports a 100 MHz bus, the V only 83.3 MHz.

However, none of this information can be derived from the datasheets
used to write the info and features section. 

***Features:...
**M1561/43/35D   Aladdin 7 ArtX    [no datasheet, some info]  11/08/99...
**M6117          386SX Single Chip PC                              <97...
**
**Support Chips:
**M1535/D        South Bridge                                        ?...
**
**May not exist:...
**Later Chipsets:...
**Other:...
*AMD . . . . . . . [no datasheets, some info]...
*Chips & Technologies...
*Contaq  . . . . . [no datasheets, some info]...
*Efar Microsystems [no datasheets, some info]...
*ETEQ...
*Faraday...
*Forex . . . . . . [List only, no datasheets found]...
*Intel...
**82495DX/490DX DX CPU-Cache Chip Set                           <Sep91
***Notes:...
***Info:...
***Configurations:...
***Features:...
**82495XP/490XP Cache Controller / Cache RAM (for i860)       06/05/91...
**82496/491     Cache Controller / Cache RAM (for P5 Pentium) 03/22/93...
**82497/492   Cache Controller / Cache RAM (for P54 Pentium)    <Nov94...
**82498/493   Cache Controller / Cache RAM (for P54 Pentium)    <Nov94...
**
**Later chipsets (basic spec):
**440 series:...
**450NX  (?)            06/29/98:...
**?????  (Profusion)    c:99...
**800 series...
*Headland/G2...
*HMC (Hulon Microelectronics)...
*Logicstar...
*Motorola...
*OPTi...
*PC CHIPS/Amptron/Atrend/ECS/Elpina/etc...
*SIS...
*Symphony...
*TI (Texas Instruments)...
*UMC...
*Unresearched:...
*VIA...
*VLSI...
*Western Digital...
*Winbond...
*ZyMOS...
*General Sources:...